| 1 | #!/bin/sh |
| 2 | # |
| 3 | # Copyright (C) 2013 - Christian Babeux <christian.babeux@efficios.com> |
| 4 | # |
| 5 | # This program is free software; you can redistribute it and/or |
| 6 | # modify it under the terms of the GNU General Public License |
| 7 | # as published by the Free Software Foundation; only version 2 |
| 8 | # of the License. |
| 9 | # |
| 10 | # This program is distributed in the hope that it will be useful, |
| 11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | # GNU General Public License for more details. |
| 14 | # |
| 15 | # You should have received a copy of the GNU General Public License |
| 16 | # along with this program; if not, write to the Free Software |
| 17 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 18 | # |
| 19 | |
| 20 | # System binaries paths. |
| 21 | CAT_BIN="cat" |
| 22 | PGREP_BIN="pgrep" |
| 23 | MKDIR_BIN="mkdir" |
| 24 | LTTNG_BIN="lttng" |
| 25 | |
| 26 | # Session name |
| 27 | SESSION_NAME="coredump-handler" |
| 28 | |
| 29 | # Sessiond binary name. |
| 30 | SESSIOND_BIN_NAME="lttng-sessiond" |
| 31 | |
| 32 | # Core file settings. |
| 33 | CORE_PATH="/tmp/lttng/core" |
| 34 | CORE_PREFIX="core" |
| 35 | |
| 36 | # Core specifiers, see man core(5) |
| 37 | |
| 38 | p=$1 # PID of dumped process |
| 39 | u=$2 # (numeric) real UID of dumped process |
| 40 | g=$3 # (numeric) real GID of dumped process |
| 41 | s=$4 # number of signal causing dump |
| 42 | t=$5 # time of dump, expressed as seconds since the Epoch, |
| 43 | # 1970-01-01 00:00:00 +0000 (UTC) |
| 44 | h=$6 # hostname (same as nodename returned by uname(2)) |
| 45 | e=$7 # executable filename (without path prefix) |
| 46 | E=$8 # pathname of executable, with slashes ('/') replaced |
| 47 | # by exclamation marks ('!'). |
| 48 | c=$9 # core file size soft resource limit of crashing process |
| 49 | # (since Linux 2.6.24) |
| 50 | |
| 51 | # Save core dump from stdin. |
| 52 | $MKDIR_BIN -p "${CORE_PATH}" |
| 53 | $CAT_BIN - > "${CORE_PATH}/${CORE_PREFIX}.$p" |
| 54 | |
| 55 | # Optional, chain core dump handler with original systemd script. |
| 56 | #$CAT_BIN - | /usr/lib/systemd/systemd-coredump $p $u $g $s $t $e |
| 57 | |
| 58 | # TODO: Checking for a sessiond lockfile would be more appropriate. |
| 59 | if $PGREP_BIN -u root "${SESSIOND_BIN_NAME}" > /dev/null 2>&1 |
| 60 | then |
| 61 | $LTTNG_BIN snapshot record -s ${SESSION_NAME} > /dev/null 2>&1 |
| 62 | fi |